package practice.w910;

public class StringBuilderDemo {
    public static void main(String[] args) {
        String str = "好好学习Java";
        StringBuilder builder = new StringBuilder(str);
        builder.append(",为了找个好工作");
        System.out.println(builder);

        builder.replace(9, 16, "就是为了改变世界");
        System.out.println(builder);

        builder.delete(0, 8);
        System.out.println(builder);

        builder.insert(0, "活着");
        System.out.println(builder);

        builder.reverse();
        System.out.println(builder);
    }


//    String str = "好好学习Java";
//    StringBuilder builder = new StringBuilder(str);
//        builder.append(",为了找个好工作");
//        System.out.println(builder);
//
//        builder.replace(9,16,"就是为了改变世界");
//        System.out.println(builder);
//
//        builder.delete(0,8);
//        System.out.println(builder);
//
//        builder.insert(0,"活着");
//        System.out.println(builder);
//
//        builder.reverse();
//        System.out.println(builder);
}
